I bought the Green Mountain because Keurig was out of Starbuck's Sumatra. I found the GM alternative to be weak when used in the middle position of my Keurig machine and bitter when used in the small cup size. Not the smooth, strong Sumatra I'm used to.
I like the Dunkin’ Donuts blend better. I read the reviews for the Sumatra blend and thought I might like it, but it was just a little too strong for me and just a tad bitter. Judgment about any coffee is always personal and subjective. Therefore, I would recommend this coffee to anyone who likes a stronger blend.